Facts: The Purple Ribbon Worm

The purple ribbonworm is a predatory marine invertebrate found within intertidal marine environments in the Pacific Ocean. In the East Pacific, they can be found from the Aleutian Islands in Alaska to Baja, California, Mexico. In the West Pacific, they can be found from Siberia to Japan. Purple ribbonworms have a long and elastic body. Their shape makes them look a lot like traditional terrestrial worms. Their coloration is typically purple-brown to bluish-purple on their upper surface, while their underside is cream-colored. They normally grow to a length of 5 inches, but can sometimes reach lengths of up to 10 inches. These worms inhabit rocky and muddy areas, specifically residing within the mid-to-low intertidal zones. They are known to live as long as one and a half years. Ribbonworms are active predators. The purple ribbonworm targets a variety of segmented worms, including the musselworm and other polychaetes. Purple ribbonworms lack long-range tracking, and a worm reportedly normally cannot detect its prey until it physically bumps into it. Upon contact, the worm immediately deploys a highly specialized, extendable feeding apparatus known as a proboscis, which can measure up to half the length of its body. It coils the proboscis around the prey. The tip of the proboscis is armed with a nail-like weapon called a stylet. The worm uses this stylet to stab its victim and release a potent neurotoxin. Even though a prey item like the musselworm can be much larger and possess powerful jaws, the purple ribbonworm can often successfully paralyze it. After stabbing, the ribbonworm briefly lets go to allow the neurotoxin to take effect before swallowing the prey whole. When purple ribbonworms are handled or picked up, most will constrict or break apart into several distinct pieces. This fragmentation is believed to serve as a mechanism for multiplication, as each broken piece retains the capacity to completely regenerate its missing parts and form a whole new identical worm. For more marine facts, click the subscribe button!!